Pen



FIG. 1 is an upper front right perspective view of a pen showing our design;

FIG. 2 is an exploded lower front left perspective view thereof;

FIG. 3 is a right side elevation view of the pen shown in FIG. 1, with the cap removed and placed on the opposite end of the pen;

FIG. 4 is a bottom plan view of the pen shown in FIG. 1;

FIG. 5 is a top plan view thereof;

FIG. 6 is a front elevation view thereof;

FIG. 7 is a right side elevation view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is a left side elevation view thereof;

FIG. 10 is a front elevation view thereof, shown without the cap for convenience of illustration;

FIG. 11 is a right side elevation view thereof;

FIG. 12 is a rear elevation view thereof;

FIG. 13 is a left side elevation view thereof;

FIG. 14 is a bottom plan view thereof; and,

FIG. 15 is a top plan view thereof. 

The ornamental design for a pen, as shown and described. 